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"Mhari was considering applying to attend university and one of her main passions was music - she loved going to gigs.

"What we need now is to find out exactly what happened to Mhari and we want anyone who thinks they may have information to get in touch with the police.

"We thank everyone for their support and ask that we be left in privacy to grieve at this time."

Detective Inspector Susan Balfour from the Major Investigation Team said: "Our deepest sympathies are with Mhari's family and friends at this time and we are carrying out a thorough investigation to establish the full circumstances surrounding her death.

"We believe Mhari met a friend in the city centre, near to Waverley Station, on Friday afternoon before making her way to Calton Hill sometime later.

The schoolgirl had met a friend on Friday afternoon but mystery surrounds her final hours